Skip to main content
Testing. You are viewing the public testing version of GCN. For the production version, go to
New Announcement Feature, Code of Conduct, Circular Revisions. See news and announcements

GCN Circular 12127

GRB 110709A: Swift-BAT refined analysis
2011-07-10T00:18:48Z (13 years ago)
Scott Barthelmy at NASA/GSFC <>
T. Sakamoto (GSFC/UMBC), S. D. Barthelmy (GSFC), W. H. Baumgartner (GSFC/UMBC),
J. R. Cummings (GSFC/UMBC), N. Gehrels (GSFC), S. T. Holland (CRESST/USRA/GSFC),
H. A. Krimm (GSFC/USRA), C. B. Markwardt (GSFC), D. M. Palmer (LANL),
M. Stamatikos (OSU), J. Tueller (GSFC), T. N. Ukwatta (MSU)
(i.e. the Swift-BAT team):
Using the data set from T-239 to T+733 sec from recent telemetry downlinks,
we report further analysis of BAT GRB 110709A (trigger #456939)
(Holland, et al., GCN Circ. 12118).  The BAT ground-calculated position is
RA, Dec = 238.895, 40.918 deg, which is 
   RA(J2000)  =  15h 55m 34.8s 
   Dec(J2000) = +40d 55' 06.4" 
with an uncertainty of 1.0 arcmin, (radius, sys+stat, 90% containment).
The partial coding was 91%.
The mask-weighted light curve shows at least 8 peaks starting at T-5 sec,
with the brightest peak at ~T+34 sec, and returning to background
at ~T+100 sec.  T90 (15-350 keV) is 44.7 +- 1.0 sec
(estimated error including systematics).
The time-averaged spectrum from T-4.3 to T+65.5 sec is best fit by a simple
power-law model.  The power law index of the time-averaged spectrum is
1.24 +- 0.03.  The fluence in the 15-150 keV band is 1.0 +- 0.02 x 10^-05 erg/cm2.
The 1-sec peak photon flux measured from T+34.31 sec in the 15-150 keV band
is 6.2 +- 0.2 ph/cm2/sec.  All the quoted errors are at the 90% confidence
The results of the batgrbproduct analysis are available at
Looking for U.S. government information and services? Visit